JPS6347302Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an insulator that buffers or absorbs vibrations.

FIG. 1 shows a partially cutaway side view of a conventional insulator.

In this figure, reference numeral 1 denotes a hemispherical rubber body, which has a hole 2 in the center through which a mounting bolt 4 is inserted, and a flange 3 at the end. 5 is polybutene as an elastic body filled in the rubber body 1; 6 is a cover body made of synthetic resin; a felt 7 is fixed on one side and a flange 3 is fixed on the opposite side with an adhesive 8; .

The conventional insulator configured as described above has a flange 3 of a rubber body 1 filled with polybutene 5.
was attached to the cover body 6 with an adhesive 8 and manufactured manually. Therefore, the amount of adhesive 8 used tends to vary, and if there is too little adhesive 8, it will result in poor adhesion, and if there is too much adhesive 8, the finish will not be good, resulting in poor workability and poor operator skill. There was a problem with the required degree.

This invention was made in view of the above points, and aims to provide an insulator in which the cover body and the rubber body are fixed by stoppering, and the number of work steps is reduced. This invention will be explained below based on the drawings.

FIG. 2 is a partially cutaway exploded view of an insulator showing an embodiment of this invention, FIG. 3 is an assembled side view of FIG. 2, and FIG. 4 is a partially enlarged view of FIG. 3.

In Fig. 2, reference numeral 11 denotes a cover body made of synthetic resin, which has a hole 12 in the center through which a mounting bolt 29 is inserted, and a ring-shaped inner circumferential protrusion 13 and an outer circumferential protrusion 14 formed on the inner surface. ing. A locking tongue piece 1 is continuously provided at the tip of the outer peripheral projection 14.
5 is provided. Reference numeral 16 denotes a main body made of rubber, and includes an inner circumferential wall 17, a bottom wall 18, an outer circumferential wall 19, and a collar portion 20 continuous to the outer circumferential wall 19. This flange 20 has a step 21 so that the outer circumferential side is thicker.
(see FIG. 4) is formed.

A doughnut-shaped recess 22 is formed by the inner circumferential wall 17, the bottom wall 18, and the outer circumferential wall 19. 23 is felt provided at the bottom of the recess 22, and 24 is elastic polybutene filled in the recess 22. 25 is a synthetic resin stopper ring,
Engagement surface 2 that engages with locking tongue piece 15 of cover body 11
6 and a step 27 that abuts against the step 21 of the rubber main body 16 is provided.

The insulator of the present invention is formed by assembling the above-mentioned components.
That is, the outer peripheral wall 19 and flange part 20 of the rubber main body 16 (the felt 23 is already attached) are inserted between the cover body 11, the inner circumferential protrusion 13, and the outer circumferential protrusion 14, and the concave part 22 is filled with polybutene 24. ,
The rubber main body 16 is positioned by the inner peripheral protrusion 13. In this state, when the stopper ring 25 is pressed and fitted between the outer circumferential protrusion 14 of the cover body 11 and the outer circumferential wall of the rubber main body 16, the engagement surface 26 of the stopper ring 25 engages with the locking tongue of the cover body 11. 1
5 and is fixed to the cover body 11. In this state, the step 27 of the stopper ring 25 is
The flange 2 abuts against the step 21 of the rubber main body 16, and the flange 2
0 and the outer circumferential wall 1 to the inner circumferential protrusion 13.
Press 9.

Then, the insulator in the state shown in FIG. 3 is constructed. This insulator can be attached to equipment with bolts 29 in the same manner as in the conventional case.

As described above, the insulator of the present invention attaches the rubber body 16 to the cover body 11 without using adhesive.
The insulator according to this embodiment has the advantage that it can be easily fixed by the stopper ring 25, but the insulator according to this embodiment also has the following advantages.

For example, even if a load deviates from the direction of arrow A in FIG. The cover body 1 is braked by the rubber body 16.
1 damage can be prevented.

Furthermore, a rubber main body 16 and a stopper ring 2 are provided.
5 has steps 21 and 27, respectively, so
Even if a pulling force is applied to the rubber main body 16 in the direction of arrow B in FIG. 4, the rubber main body 16 can be easily prevented from coming off due to the collision between the steps 21 and 27. In addition, a stopper ring 25 and a rubber body 1 are also included.
When a ring-shaped space 28 is provided between the outer circumferential walls 19 of the insulators 6 and 6, the rubber main body 1
The length to the fixed point where the outer peripheral wall 19 of 6 first contacts the stopper ring 25 is L _l , which is longer than the length L _s when the space 28 is not provided, and the effect of buffering or absorbing vibration is the same. In addition, when a large load is applied, the space 28 allows the rubber main body 16 and the polybutene 24 to escape from deformation, and the height of the insulator can be reduced.

As explained above, the insulator of this invention inserts the outer peripheral wall and flange of the rubber body filled with an elastic body between the inner and outer periphery protrusions of the cover body, and presses the flange with a stopper ring. Since the inner peripheral projection, the outer peripheral projection, and the locking tongue are used to lock the cover body, the cover body and the rubber main body can be easily fixed together with a stopper ring, and there is an advantage that the number of manufacturing steps can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a conventional insulator, Fig. 2 is a partially cutaway exploded view of an insulator showing an embodiment of this invention, and Fig. 3 is an assembled side view of Fig. 2. , FIG. 4 is a partially enlarged view of FIG. 3. In the figure, 11 is a cover body, 13 is an inner peripheral protrusion, 14
15 is an outer peripheral projection, 15 is a locking tongue piece, 16 is a rubber main body, 17 is an inner peripheral wall, 18 is a bottom wall, 19 is an outer peripheral wall, 20 is a flange, 24 is polybutene, 25 is a stopper ring, 26 is an engagement It is a surface.

Claims (1)

[Scope of utility model registration request] A concentric inner protrusion and an outer circumferential protrusion are provided on the inner plane, and a cover body has a locking tongue piece formed at the tip of the outer circumferential protrusion, and a concave interior consisting of an inner circumferential wall, an outer circumferential wall, and a bottom wall has an elastic structure. The rubber main body is filled with a rubber body and has one end of the outer peripheral wall as a flange, and the flange of the rubber main body is abutted between a concentric inner peripheral protrusion and an outer peripheral protrusion of the cover body. a stopper ring is fitted between the outer peripheral wall and the outer peripheral protrusion, and the stopper ring is locked by the elasticity of the locking tongue, thereby fixing the rubber main body to the cover body. Insulator.